The Oklahoma mechanic who wears a kilt to work to beat the heat - and sports it the traditional way...

A car mechanic in Tulsa, Oklahoma has found an original way to beat the heat by wearing a kilt to work throughout the stifling summer months, the traditional way.

Every year for the past four, from May to October, David O'Brien, 47, tends to his clients' automotive needs clad in the Celtic-style skirt bought right in Tulsa from a local manufacturer.

But the garage isn't the only place he can be seen sporting the unorthodox work attire - the auto expert even visits the local Quick Tip convenience store and takes his 14-year-old daughter to school in his liberating outfit.

Keeping cool: Auto mechanic, David O'Brien, 47, from Tulsa, Oklahoma, (right) and his partner David Denney beat the summer heat by wearing the traditional Celtic skirt the traditional way

The plain black, Irish kilt is made of a more breathable and cooler cotton fabric than the thick woolen, Scottish alternative, Mr O'Brien explained to MailOnline.

An added danger, he continued, is the leather interior which in soaring heat will 'blister your backside.'

The owner of O'Brien Auto Performance, Mr O'Brien sees the functional fashion choice as an extension of his Irish and Scottish heritage, one that is displayed proudly throughout his garage from the shamrock company logo to the Irish folk music that plays in the background.

Proud: The choice to wear the kilt compliments Mr O'Brien's Irish and Scottish heritage the evidence of which is displayed throughout his business' premises

Sturdy: Temperatures in Tulsa have reached as high as 144 degrees this month and the lightweight kilts help in the non-air conditioned garage

And while acknowledging the stares and giggles while out and about running errands, he proudly proclaims of his kilt: 'This is the manliest manwear you can wear.'

Unlike many other teens embarrassed by their parents, his daughter doesn't seem to mind.

'My daughter is okay with it,' Mr O'Brien assured MailOnline. 'Her grandfather played the bagpipes and when she was younger she used to take part in our Irish parade.'

But one man who still needs convincing is fellow mechanic, Ryan Henry, who says even wearing shorts at work feels 'odd' and refuses to wear anything but jeans.

Or perhaps he is avoiding the expense of joining his colleagues' whimsy seeing as the traditional highland garments, that Mr O'Brien customises with the embroidered words 'work kilt', cost a staggering $135.

Meeting: Mr O'Brien (right) and his sidekick David 'Dinkums' Denney )left) are the only ones who wear the kilts at O'Brien Auto

Asked whether he has worn his kilt on weekends, he told MailOnline: 'I've threatened to wear it to play golf but haven't yet. There's a bit too much celebrating on the course and things might get out of hand in just a kilt.'